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162c44e325
There is a wrong assumption that the vector element type and the type of each ConstantSDNode in the build_vector were the same. However, when promoting the integer operand of a legally typed build_vector, the operand type and the vector element type do not need to be the same (See method 'DAGTypeLegalizer::PromoteIntOp_BUILD_VECTOR' in LegalizeIntegerTypes.cpp). in AArch64 backend, the following dag sequence: C0: i1 = Constant<0> C1: i1 = Constant<-1> V: v8i1 = BUILD_VECTOR C1, C1, C0, C0, C0, C0, C0, C0 is type-legalized into: NewC0: i32 = Constant<0> NewC1: i32 = Constant<1> V: v8i8 = BUILD_VECTOR NewC1, NewC1, NewC0, NewC0, NewC0, NewC0, NewC0, NewC0 Forcing a getZeroExtend to VTBits to ensure that the new constant is correctly. llvm-svn: 198582 |
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